Mitsubishi Outlander GS45X. Manual - part 126

MMCS

TSB Revision

CHASSIS ELECTRICAL

54A-501

STEP 6. Using scan tool MB991958, read the CAN box unit 
diagnostic trouble code. 
Check again if the DTC is set to the CAN box unit.
Q: Is the DTC set?

YES : Troubleshoot the MMCS (Refer to 

P.54A-460

).

NO :  Go to Step 7.

STEP 7. Using scan tool MB991958, read the ETACS-ECU 
diagnostic trouble code.
Check if the diagnostic trouble code is set to the ETACS-ECU.
Q: Is the DTC set?

YES : Diagnose the ETACS-ECU (Refer to GROUP 54A 

− 

ETACS-ECU 

− Troubleshooting 

P.54A-732

).

NO :  Go to Step 8.

STEP 8. Check the service data log for the MMCS service 
mode.
(1) Display the service data log for the MMCS service mode. 

(Refer to 

P.54A-443

)

(2) Check if the service data log for drive and HDD is displayed.
Q: Is the service data log displayed?

YES (The service data log for drive is displayed.) : 

Perform Inspection Procedure 8 "CD/DVD cannot be 
Played."(Refer to 

P.54A-539

.) or Inspection 

Procedure 9 "Image of a DVD is Played, but no 
Sound is Played." (Refer to 

P.54A-541

.) Go to Step 9.

YES (The service data log for HDD is displayed.) : 

Abnormalities relating to high or low temperature may 
be present. Check if the multivision display can output 
the sound at the operable temperature. If it cannot 
output the sound, go to Step 9.

YES (The service data log for AMP is displayed.) : Go to 

Step 9.

NO :  Go to Step 9.

STEP 9. Perform "Network/Connect Line Check" in the 
MMCS service mode.
(1) Display "Network/Connect Line Check" in the MMCS 

service mode. (Refer to 

P.54A-443

)

(2) Check if "DVD Drive OK" is displayed.
(3) Check if "HDD Drive OK" is displayed.
(4) Check if "Premium Audio OK" is displayed.
Q: Is the check result normal?

YES : Go to Step 18.
NO :  Go to Step 10.

MMCS

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CHASSIS ELECTRICAL

54A-502

STEP 10. Check audio amplifier connector D-126 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is audio amplifier connector D-126 in good condition?

YES : Go to Step 11.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 11. Check the ground circuit to the rear monitor. 
Measure the resistance at audio amplifier connector D-126.
(1) Disconnect audio amplifier connector D-126, and measure 

the resistance available at the wiring harness side of the 
connector.

(2) Measure the resistance between terminal 24 and ground.

OK: The resistance should be 2 ohms or less

(3) Measure the resistance between terminal 31 and ground.

OK: The resistance should be 2 ohms or less

(4) Measure the resistance between terminal 32 and ground.

OK: The resistance should be 2 ohms or less

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 13.
NO :  Go to Step 12.

AC702818 BB

Harness side: D-126

AC702818 BC

Harness side: D-126

AC702818 BD

Harness side: D-126

MMCS

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CHASSIS ELECTRICAL

54A-503

STEP 12. Check the wiring harness between audio 
amplifier connector D-126 (terminal 24, 31, 32) and ground.

• Check the ground wire for open circuit.

Q: Is the wiring harness between audio amplifier connector 

D-126 (terminal 24, 31, 32) and ground in good 
condition?
YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00, How to use 
Troubleshooting/inspection Service Points, How to 
Cope with Intermittent Malfunction 

P.00-15

).

NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. 

STEP 13. Check the power supply circuit to the 
ETACS-ECU. Measure the voltage at audio amplifier 
connector D-126.
(1) Disconnect audio amplifier connector D-126, and measure 

the voltage available at the wiring harness-side connector.

(2) Measure the voltage between terminal 25 and ground.

OK: The voltage should measure approximately 12 
volts (battery positive voltage).

(3) Measure the voltage between terminal 35 and ground.

OK: The voltage should measure approximately 12 
volts (battery positive voltage).

(4) Measure the voltage between terminal 36 and ground.

OK: The voltage should measure approximately 12 
volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery 

positive voltage)?
YES : Go to Step 15.
NO :  Go to Step 14.

AC702831AU

Harness side: D-126

AC702831AT

Harness side: D-126

AC702831AV

Harness side: D-126

MMCS

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CHASSIS ELECTRICAL

54A-504

STEP 14. Check the wiring harness between audio 
amplifier connector D-126 (terminal 25, 35, 36) and fusible 
link (36).
NOTE: Also check intermediate connector C-129 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector C-129 is damaged, repair 
or replace the connector as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

• Check the power supply line for open circuit and short cir-

cuit.

Q: Is the wiring harness between audio amplifier connector 

D-126 (terminal 25, 35, 36) and fusible link (36) in good 
condition?
YES : Go to Step 15.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. 

STEP 15. Check multivision display connector C-06, C-10 
and audio amplifier connector D-127 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Is multivision display connector C-06 and audio 

amplifier connector D-127 in good condition?
YES : Go to Step 16.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 16. Check the wiring harness between multivision 
display connector C-06 (terminal 82) and audio amplifier 
connector D-127 (terminal 3)
NOTE: Also check intermediate connectors C-15 and C-22 for 
loose, corroded, or damaged terminals, or terminals pushed 
back in the connector. If intermediate connector C-15 or C-22 is 
damaged, repair or replace the connector as described in 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

• Check the communication line for open circuit and short cir-

cuit.

Q: Is the wiring harness between multivision display 

connector C-06 (terminal 82) and audio amplifier 
connector D-127 (terminal 3) in good condition?
YES : Go to Step 17.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary.